Looks at the history of research on how carbon dioxide causes climate change, the key points of the Intergovernmental Panel on Climate Change’s reporting, and how climate change is portrayed in the media. Also, it discusses the importance of decreasing Short-lived Climate Pollutants (SLCPs) to mitigate climate change and some possible solutions to reduce these pollutants produced by the poorest communities. Additionally, this section looks at how climate change has affected California’s water and energy use, and how climate change threatens global food security.